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Finding the Fourth Proportional to 100,648.56, 138,895.02 and 58,209.83

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Solution

The fourth proportional to 100,648.56, 138,895.02 and 58,209.83 is: 80,329.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,648.56 : 138,895.02 = 58,209.83 : x
  2. Step 2: Convert to fraction form
    100,648.56/138,895.02 = 58,209.83/x
  3. Step 3: Cross multiply
    100,648.56x = 138,895.02 × 58,209.83
  4. Step 4: Simplify right side
    100,648.56x = 8,085,055,502.05
  5. Step 5: Solve for x
    x = 8,085,055,502.05/100,648.56
  6. Step 6: Final answer
    x = 80,329.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.